/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.glass.ui.monocle;

import java.nio.Buffer;
import java.nio.IntBuffer;
import com.sun.glass.ui.monocle.linux.LinuxSystem;
import java.lang.reflect.Method;
import java.util.Locale;

public abstract class NativeScreen {
    private static long glesLibraryHandle;
    private static long eglLibraryHandle;
    private static long nativeDisplayType;
    private static boolean initialized;

    public abstract int getDepth();
    public abstract int getNativeFormat();
    public abstract int getWidth();
    public abstract int getHeight();
    public abstract int getDPI();
    public abstract long getNativeHandle();
    public abstract void shutdown();
    public static long platformGetNativeDisplay() {return 0L;};


    public abstract void uploadPixels(Buffer b,
                             int x, int y, int width, int height, float alpha);

    public abstract void swapBuffers();

    public abstract IntBuffer getScreenCapture();

    protected static boolean initPlatformLibraries() {
        LinuxSystem ls = LinuxSystem.getLinuxSystem();
        glesLibraryHandle = ls.dlopen("libGLESv2.so", LinuxSystem.RTLD_LAZY | LinuxSystem.RTLD_GLOBAL);
        eglLibraryHandle = ls.dlopen("libEGL.so", LinuxSystem.RTLD_LAZY | LinuxSystem.RTLD_GLOBAL);
        return true;
    }

    public static synchronized long getNativeDisplay() {
        String platformNativeScreenName;

        if (initialized) {
            // already initialized
            return nativeDisplayType;
        }
        String platformName = NativePlatformFactory.getNativePlatformName();
        platformNativeScreenName = "com.sun.glass.ui.monocle." + platformName + "." +
                                           platformName.toUpperCase(Locale.ROOT) + "Screen";
        initPlatformLibraries();
        try {
            Method platformMethod = Class.forName(platformNativeScreenName).getMethod("platformGetNativeDisplay");
            nativeDisplayType = (long)platformMethod.invoke(null);
        } catch (Exception e){
            e.printStackTrace();
        }

        initialized = true;
        return nativeDisplayType;
    }

}